Palmitoyl-16,16,16-d3-L-carnitine Hydrochloride is the isotope labelled analog of Palmitoyl-L-carnitine Hydrochloride (P155050); a long-chain fatty ester of carnitine which is accumulated and released into the circulation in fatty-acid oxidation defects. Molecular Formula: C23H43D3ClNO4 Molecular Weight: 439.09